Use this Tulip Knob Latch as a replacement part on
out swinging wood or metal storm or screen doors from 5/8 to 1-1/4 inch (15.9 to 31.8 millimeter) thick. It installs with three 1/4 inch (6.4 millimeter) holes and has a night lock. To make this unit a keyed unit, order a K5021 locking unit.